Optimization of Twin-screw Extrusion of Corn Spermoderm Fiber by Response Surface Methodology

doi:10.7506/spkx1002-6630-201118002

Abstract

Abstract: Soluble dietary fiber (SDF) was prepared by twin-screw extrusion of defatted corn spermoderm, and the extrusion conditions were optimized by response surface analysis. On the basis of one-factor-at-a-time experiments, the optimal extrusion conditions for maximizing SDF content in final products were determined by using a 3-variable, 3-level Box-Behnken experimental design combined with response surface analysis as follows: material moisture content 138%, material granularity 0.175 mm and extrusion temperature 169 ℃, resulting in an SDF yield in final products of 10.75%, which is in basic agreement with the predicted value of 11.01%. Thus, the optimal process is reliable.

Key words: response surface methodology, corn spermoderm fiber, twin-screw extrusion

CLC Number:

TS210.4

WANG Da-wei，DU Cai-xia，ZHOU Qing-tao，WANG Yan. Optimization of Twin-screw Extrusion of Corn Spermoderm Fiber by Response Surface Methodology[J]. FOOD SCIENCE, 2011, 32(18): 6-10.

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Optimization of Twin-screw Extrusion of Corn Spermoderm Fiber by Response Surface Methodology

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